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Effect of Curcumol on NOD-Like Receptor Thermoprotein Domain 3 Inflammasomes in Liver Fibrosis of Mice

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Abstract

Objective

To investigate the effect of curcumol on NOD-like receptor thermoprotein domain 3 (NLRP3) inflammasomes, and analyze the mechanism underlying curcumol against liver fibrosis.

Methods

Thirty Kunming mice were divided into a control group, a model group and a curcumol group according to a random number table, 10 mice in each group. Mice were intraperitoneally injected with 40% carbon tetrachloride (CCl4:peanut oil, 2:3 preparation) at 5 mL/kg for 6 weeks, twice a week, for developing a liver fibrosis model. The mice in the control group were given the same amount of peanut oil twice a week for 6 weeks. The mice in the curcumol group were given curcumol (30 mL/kg) intragastrically, and the mice in the model and control groups were given the same amount of normal saline once a day for 6 weeks. Changes in liver structure were observed by hematoxylin and eosin (HE) and Masson staining. Liver function, liver fiber indices, and the expression of interleukin (IL)-10 and tumor necrosis factor-α (TNF-α) levels were determined by automatic biochemical analyzer and enzyme linked immunosorbent assay kit. Immunoblotting and reverse transcription-quantitative PCR (RT-qPCR) were performed to detect the expression of NLRP3 inflammasome-related molecules, TGF-β and collagen.

Results

HE and Masson staining results showed that the hepatocytes of the model group were arranged irregularly with pseudo-lobular structure and a large amount of collagen deposition. The mice in the curcumol group had a significant decrease in liver function and liver fibers indices compared with the model group (P<0.05); RT-qPCR and Western blotting results reveal that, in the curcumol group, the mRNA and protein expression levels of NLRP3, IL-1 β, Caspase 1 and gasdermin D decreased significantly compared with the model group (P<0.05); immunohistochemical results showed that in the curcumol group, the protein expression levels of NLRP3 and IL-1 β decreased significantly compared with the model group (P<0.05).

Conclusion

A potential anti-liver fibrosis mechanism of curcumol may be associated with the inhibition of NLRP3 inflammasomes and decreasing the downstream inflammatory response.

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Acknowledgements

The authors would like to thank Guangxi University of Chinese Medicine for providing the laboratory equipment and technological support.

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Authors and Affiliations

Authors

Contributions

Zheng Y and Zhao TJ designed this experiment. Zheng Y and Wang L performed the molecular biology detection and wrote this article; Liu LL and Wang JH were responsible for the pathology detection; Zheng Y and Zhao TJ revised this article. And all authors agreed the final version for publication.

Corresponding author

Correspondence to Tie-jian Zhao.

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Conflict of Interest

The authors declare that there are no financial conflicts of interest.

Supported by the National Natural Science Foundation of China (No. 81960751, 81660705) and Guangxi Young and Middle-aged Teachers’ Research Ability Improvement Project (No. 2020KY59009), Guangxi Zhuangyao Pharmaceutical Key Laboratory (No. GXZYZZ2019-1, GXZYZZ2020-07), Guangxi Natural Science Foundation Youth Project (No. 2020GXNSFBA297094), Guangxi University of Traditional Chinese Medicine School-level Project Youth Fund (No. 2020QN006)

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Zheng, Y., Wang, L., Wang, Jh. et al. Effect of Curcumol on NOD-Like Receptor Thermoprotein Domain 3 Inflammasomes in Liver Fibrosis of Mice. Chin. J. Integr. Med. 28, 992–999 (2022). https://doi.org/10.1007/s11655-021-3310-0

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